Cram Flashcards
https://www.youtube.com/watch?v=3rN5JZdu9-Y&t=3221s
In the following typology how is it physically and logically structured:
Bus
Physical: Bus
Logical: Bus
In the following typology how is it physically and logically structured:
Star
Physical: Star
Logical: Bus
In the following typology how is it physically and logically structured:
Token Ring
Physical: Bus
Logical: Ring
In the following typology how is it physically and logically structured:
Point-to-Point
Physical: Bus
Logical: Bus
In the following typology how is it physically and logically structured:
FDDI
Physical: Ring
Logical: Ring
Can track the number of connections to a web server to understand what is typical
stateful firewall
Doesn’t have the enhanced capability to make decisions based on historical data. Watch real-time network traffic and block based on static values
stateless firewall
How does wireless networking handle collisions
CSMA/CD:
carrier sense multiple access with collision avoidance
WLC
Wireless LAN Controller
List OSI from top to bottom
- Application
- Presentation
- Session
- Transport
- Network
- Data Link
- Physical
Application layer PDU (Protocol Data Unit)
Data
Presentation layer PDU (Protocol Data Unit)
Data
Session layer PSU (Protocol Data Unit)
Data
Transport layer PSU (Protocol Data Unit)
Segment
Network layer PSU (Protocol Data Unit)
Packet
Data Link PSU (Protocol Data Unit)
Frame
Physical PSU (Protocol Data Unit)
Bits
Application layer example
Presentation layer example
mp3, mp4
Session layer example
SQL, NFS
Transport layer example
TCP/UDP
Network layer example
IP/RIP
Data link layer example
Frame relay
Physical layer example
cables & devices
TCP layers
- Application
- Transport
- Network
- Data link
- Physical
Port #: 20
FTP data
Port #: 21
FTP control
Port #: 22
SSH
Port #: 23
Telnet
Port #: 25
SMTP
Port #: 53
DNS
Port #: 69
TFTP
Port #: 80
HTTP
Port #: 110
POP3
Port #: 119
NNTP
Port #: 123
NTP
Port #: 143
IMAP
Port #: 161/162
SNMP
Port #: 443
HTTPS
Cisco Networking Model:
Core Layer purpose
to switch traffic as quickly as possible. No packet manipulation, VLANs, assess-lists
Cisco Networking Model:
Distribution Layer purpose
time sensitive manipulation. ie. routing, filtering, WAN access. Broadcast/multicast, security
Cisco Networking Model:
Access layer purpose
switches and routers, segmentation occurs here and workgroup access. Static routing
Router>
User exec
Router#
Privileged exec
Router(config)#
Global config
rommon>
ROM monitor (passwd recovery)
Router
RXboot
Cisco Discovery Protocol (CDP)
gathers info about nearby connected devices
turn off cdp on entire router
(config)# no cdp run
Link layer Discovery Protocol (LLDP)
Open standard under IEEE Standard 802.1AB. Disabled by default
LAN switch
show man-address-table